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fbdev/pm2fb: Initialize fb_ops to fbdev I/O-memory helpers

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Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230927074722.6197-27-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-09-27 09:26:59 +02:00
parent b7ba90ac14
commit a9b0061fb3
2 changed files with 3 additions and 0 deletions
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1
drivers/video/fbdev/Kconfig
View file

@ -94,6 +94,7 @@ config FB_PM2
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_IOMEM_FOPS
select VIDEO_NOMODESET
help
This is the frame buffer device driver for cards based on

2
drivers/video/fbdev/pm2fb.c
View file

@ -1492,6 +1492,7 @@ static int pm2fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
static const struct fb_ops pm2fb_ops = {
.owner = THIS_MODULE,
__FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_check_var = pm2fb_check_var,
.fb_set_par = pm2fb_set_par,
.fb_setcolreg = pm2fb_setcolreg,
@ -1502,6 +1503,7 @@ static const struct fb_ops pm2fb_ops = {
.fb_imageblit = pm2fb_imageblit,
.fb_sync = pm2fb_sync,
.fb_cursor = pm2fb_cursor,
__FB_DEFAULT_IOMEM_OPS_MMAP,
};
/*